2 years ago

Solve the system of equations 3x = 84 - 2y 9x = 8y - 24

1 answer:

8 0

Answer:

$3x = 84 - 2y - - - (i) \\ 9x = 8y - 24 - - - - (ii) \\ from \: (ii) \\ 3(3x) = 8y - 24 \\ but \: from \: (i) \: \: 3x = 84 - 2y \\ hence \: put \: (i) \: in \: (ii) \\ 3(84 - 2y) = 8y - 24 \\ 252 - 6y = 8y - 24 \\ 276 = 14y \\ y = \frac{138}{7} \\ x = \frac{104}{7}$

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Simplify the following expressions

Zigmanuir [339]

Answer:

4x -2y + 8z

Step-by-step explanation:

10 / 4 = 4x

-5y / 2.5 = -2y

20z / 2.5 = 8z

resulting in 4x -2y + 8z.

7 0

2 years ago

A robin perched in a tree 40 feet above sea level. Directly below the robin, a seagull is flying 13 feet above sea level. Direct

katrin [286]

Answer:

See explanation

Step-by-step explanation:

The question is incomplete. However, I'll solve on a general terms.

Since the robin, seagull and fish are on directly below one another; a possible question could be to calculate the distance between the robin and the clownfish

The given parameters are:

$Robin = +40ft$